Gorman-Rupp Pumps 86A2-F3L 1330589 and up - Manual (Page 30)

80 SERIES OM−00955
MAINTENANCE & REPAIR PAGE E − 10
the shaft, it is recommended that bearings
be cleaned and inspected in place. It is
strongly recommended that the bearings
be replaced any time the shaft and bear-
ings are removed.
Clean the intermediate, shaft and all component
parts (except the bearings) with a soft cloth soaked
in cleaning solvent. Inspect the parts for wear or
damage and replace as necessary.
Most cleaning solvents are toxic and
flammable. Use them only in a well ven-
tilated area free from excessive heat,
sparks, and flame. Read and follow all
precautions printed on solvent contain-
ers.
Clean the bearings thoroughly in fresh cleaning
solvent. Dry the bearings with filtered compressed
air and coat with light oil.
Bearings must be kept free of all dirt and
foreign material. Failure to do so will great-
ly shorten bearing life. Do not spin dry
bearings. This may scratch the rollers or
races, and cause premature bearing fail-
ure.
Rotate the bearings by hand to check for rough-
ness or binding and inspect the bearing rollers. If
rotation is rough or the rollers are discolored, re-
place the bearings.
The bearing tolerances provide a tight press fit
onto the shaft and a snug slip fit into the intermedi-
ate. Replace the bearing cups and cones, the
shaft, or intermediate if the proper bearing fit is not
achieved.
If bearing replacement is required, use a bearing
puller to remove the inboard and outboard bearing
cones (27 and 32) from the shaft.
Shaft and Bearing Reassembly and Installation
(Figure 2)
Clean the intermediate, shaft and all component
parts (except the bearings) with a soft cloth soaked
in cleaning solvent. Inspect the parts for wear or
damage and replace as necessary.
Most cleaning solvents are toxic and
flammable. Use them only in a well ven-
tilated area free from excessive heat,
sparks, and flame. Read and follow all
precautions printed on solvent contain-
ers.
Inspect the shaft for distortion, nicks or scratches,
or for thread damage on the impeller end. Dress
small nicks and burrs with a fine file or emery cloth.
Replace the shaft if defective.
Pre-pack the bearings by hand (or use a bearing
packer if available) with No. 0 lithium base grease
until the bearing rollers are thoroughly lubricated.
Position the inboard and outboard bearing cones
(27 and 32) on the impeller shaft (24) with the high
side of the tapered roller bearings toward the lubri-
cation cavity. Press the cones onto the shaft until
seated squarely against the shaft shoulders.
When installing the bearings onto the
shaft, never press or hit against the rollers
or roll cage. Press only on the inner race.
Press the bearing closure (33) and inboard bearing
cup (31) into the intermediate until seated squarely
against the intermediate shoulder.
When installing the shaft and bearings into
the bearing bore, push against the outer
race. Never hit the rollers or roll cage.
Slide the shaft and assembled bearing cones into
the intermediate bore from the drive end until the